LASTREA DILATATA. 



289 



usually decurrent and frequently narrowing below. My thanks 

 are due to Messrs. Stansfield, of Yale Nursery, Todmorden, 

 for fronds. 



Fig. 231.— Pinnae. 



DuMETORUM, Moore. (Fig. 231.) — Found in Silverthwaite, 

 Westmoreland, and in several other fells, by Miss M. Beever; 

 at Hawes Water by Mr. F. Clowes; at Elter Water by the 

 Rev. G. Finder; Challacombe, Devonshire, by the Rev. J. M. 

 Chanter; Ilfracombe by Mr. J, Dodds; Ingleborough, Yorkshire, 

 by Mr. T. Blezard; Glamrhin, above Rhayader, by Mr. J. R. 

 Cobb; at Snowdon by Mrs. Jennings. In Scotland in 

 Argyleshire, Dumbartonshire, Aberdeenshire, Rosshire, and 

 Caithness, by Mr. G. R. Alexander, Miss Griffith, Mr. Thomas 

 Moore, Mr. Tait, Miss Murray, and others. In Ireland in 

 AYicklow and Kerry by Mr. R. Barrington. The Isle of Man 

 by Dr. AUchin. I found plants near Longridge Fell, Lancashire, 

 and several plants in an alder wood at Chaigeley Manor. In 

 this wood I found several hundred specimens of the Clausilia 

 laminata, and quantities of Azea tridens, Balea fragilis, 

 Zua lubrica, Pupa pusilla, Pupa umhilicata, Vitnna pellucida, 

 Arion Jlatus, Avion hortcnsis, Zonites cellarius, and other 

 conchological species. I name this to shew that *^two birds 

 could be killed with one stone," at least very often: conchology 

 and botany can very well be worked together. Fronds 

 bipinnate, and dwarf, seldom exceeding twelve inches in length; 

 of a lengthened triangular-ovate form, very glandular on the 

 rachides, stipites and lower surface of the veins. Pinnae 

 blunt and concave. Pinnules convex, oblong-ovate, crispy, 

 having broad, coarse teeth, tipped by a small bristle. Stipes 



